Which car has a more efficient engine - a petrol car or an electric car?

Electric cars generally have more efficient engines than petrol cars. Electric motors convert over 60% of electrical energy from the grid to power at the wheels, while internal combustion engines in petrol cars typically convert only about 20% of the energy stored in fuel into usable power. Additionally, electric vehicles benefit from regenerative braking, which further enhances their efficiency. Overall, electric cars are more energy-efficient and environmentally friendly compared to petrol cars.